pklazy · March 13, 2023 05:04 · Jul 21, 2019 · Jul 21, 2019
diff --git a/m5stickc_lcd.py b/m5stickc_lcd.py
@@ -0,0 +1,98 @@
+import framebuf
+import time
+from machine import Pin, SPI, I2C
+
+'''
+import m5stickc_lcd
+lcd = m5stickc_lcd.ST7735()
+lcd.text('hello', 10, 10, 0xffff)
+lcd.show()
+'''
+
+
+class ST7735(framebuf.FrameBuffer):
+    def __init__(self):
+        self.baudrate = 27000000
+        self.cs = Pin(5, Pin.OUT, value=1)
+        self.dc = Pin(23, Pin.OUT, value=1)
+        self.rst = Pin(18, Pin.OUT, value=1)
+        self.spi = SPI(
+                1, baudrate=self.baudrate,
+                polarity=0, phase=0, bits=8, firstbit=SPI.MSB,
+                sck=Pin(13), mosi=Pin(15))
+
+        self.enable_lcd_power()
+
+        self.rst.on()
+        time.sleep_ms(5)
+        self.rst.off()
+        time.sleep_ms(20)
+        self.rst.on()
+        time.sleep_ms(150)
+
+        self.width = 80
+        self.height = 160
+        self.buffer = bytearray(self.width * self.height * 2)
+        super().__init__(self.buffer, self.width, self.height, framebuf.RGB565)
+        self.init_display()
+
+    def enable_lcd_power(self):
+        i2c = I2C(1, scl=Pin(22), sda=Pin(21), freq=100000)
+        i2c.writeto_mem(0x34, 0x28, b'\xff')
+        axp192_reg12 = i2c.readfrom_mem(0x34, 0x12, 1)[0]
+        axp192_reg12 |= 0x0c
+        i2c.writeto_mem(0x34, 0x12, bytes([axp192_reg12]))
+
+    def init_display(self):
+        for cmd, data, delay in [
+            (0x01, None, 150),
+            (0x11, None, 500),
+            (0xb1, b'\x01\x2c\x2d', None),
+            (0xb2, b'\x01\x2c\x2d', None),
+            (0xb3, b'\x01\x2c\x2d\x01\x2c\x2d', None),
+            (0xb4, b'\x07', None),
+            (0xc0, b'\xa2\x02\x84', None),
+            (0xc1, b'\xc5', None),
+            (0xc2, b'\x0a\x00', None),
+            (0xc3, b'\x8a\x2a', None),
+            (0xc4, b'\x8a\xee', None),
+            (0xc5, b'\x0e', None),
+            (0x20, None, None),
+            (0x36, b'\xc8', None),
+            (0x3a, b'\x05', None),
+            (0x2a, b'\x00\x02\x00\x81', None),
+            (0x2b, b'\x00\x01\x00\xa0', None),
+            (0x21, None, None),
+            (0xe0, b'\x02\x1c\x07\x12\x37\x32\x29\x2d\x29\x25\x2b\x39\x00\x01\x03\x10', None),
+            (0xe1, b'\x03\x1d\x07\x06\x2e\x2c\x29\x2d\x2e\x2e\x37\x3f\x00\x00\x02\x10', None),
+            (0x13, None, 10),
+            (0x29, None, 100),
+            (0x36, b'\xcc', 10),
+        ]:
+            self.write_cmd(cmd)
+            if data:
+                self.write_data(data)
+            if delay:
+                time.sleep_ms(delay)
+        self.fill(0)
+        self.show()
+
+    def show(self):
+        self.write_cmd(0x2a)
+        self.write_data(b'\x00\x1a\x00\x69')
+        self.write_cmd(0x2b)
+        self.write_data(b'\x00\x01\x00\xa0')
+        self.write_cmd(0x2c)
+        self.write_data(self.buffer)
+
+    def write_cmd(self, cmd):
+        self.dc.off()
+        self.cs.off()
+        self.spi.write(bytes([cmd]))
+        self.cs.on()
+
+    def write_data(self, buf):
+        self.dc.on()
+        self.cs.off()
+        self.spi.write(buf)
+        self.cs.on()
No results found